{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9628234","patent":{"patent_number":"US-9628234","title":"Reference signal transmission method for downlink multiple input multiple output system","assignee":null,"inventors":[],"filing_date":"2016-05-04T00:00:00.000Z","publication_date":"2017-04-18T00:00:00.000Z","cpc_codes":["H04L","H04B","H04L","H04L","H04W","H04W","H04W","H04W","H04W"],"num_claims":20,"abstract":"A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas (where M>N) and a second UE supporting the M transmission antennas. The method includes transmitting, by a base station (BS), subframe-associated information which designates a first subframe in which data for the first UE and the second UE is transmitted and a second subframe in which data only for the second UE can be transmitted within a radio frame having a plurality of subframes, and transmitting the first subframe and the second subframe. Reference signals corresponding to antenna ports ‘0’ to ‘N−1’ of the N antennas are mapped to the first subframe, and reference signals corresponding to antenna ports ‘0’ to ‘M−1’ of the M antennas are mapped to the second subframe."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Reference signal transmission method for downlink multiple input multiple output system","description":"A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9628234","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9628234","citation_suggestion":"Patentable. \"Reference signal transmission method for downlink multiple input multiple output system\" (US-9628234). https://patentable.app/patents/US-9628234","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9628234","json":"https://patentable.app/api/llm-context/US-9628234","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T15:05:48.205Z"}